四维超混沌射频隐身跳频通信设计方法  

Design Method of Radio Frequency Stealth Frequency Hopping Communications Based on Four-Dimensional Hyperchaotic System

作　　者：杨宇晓[1] 汪德鑫 黄琪 YANG Yu-xiao;WANG De-xin;HUANG Qi(College of Astronautics,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学航天学院,南京210016

出　　处：《宇航学报》2020年第10期1341-1349,共9页Journal of Astronautics

基　　金：国家自然科学基金(61701226)。

摘　　要：为提高飞行器通信系统的抗截获性能,提出了一种基于四维超混沌系统的射频隐身跳频通信设计方法。该方法构建了四维超混沌系统,扩展了系统解空间,有效增加了系统复杂度,并通过引入周期性扰动措施,解决了有限精度带来的短周期现象。在四维超混沌系统的基础上,利用超混沌系统生成的双通道超混沌序列,实现了跳频通信系统的频率序列和周期序列联合不确定设计方法。仿真结果表明:四维超混沌系统与传统混沌系统相比,其复杂度最优,在相同有限精度条件下,超混沌系统的周期性明显减弱。另外,基于四维超混沌设计的跳频系统,其截获概率优于常规跳频系统,具有较好的射频隐身性能。In order to improve the anti-interception performance of a vehicle communications system,a radio frequency stealth frequency hopping communications design method based on a four-dimensional hyperchaotic system is proposed.This method constructs a four-dimensional hyperchaotic system,expands the system solution space,effectively increases the system complexity,and solves the short-period phenomenon caused by limited accuracy by introducing the periodic disturbance measures.Based on the four-dimensional hyperchaotic system,the dual-channel hyperchaotic sequence generated by the hyperchaotic system is used to realize the joint uncertain design method of the frequency sequence and periodic sequence of the frequency hopping communication systems.The simulation results show that compared with the traditional chaotic system,the four-dimensional hyperchaotic system has the best complexity.Under the same limited precision,the periodicity of the hyperchaotic system is significantly weakened.In addition,the frequency hopping system based on the four-dimensional hyperchaotic design has better interception probability than the conventional frequency hopping system,and has better radio frequency stealth performance.

关 键 词：四维超混沌系统 射频隐身 跳频系统 跳频频率 跳频周期 

分 类 号：TN918.91[电子电信—通信与信息系统]